<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id='app'>
        <h2>{{msg}}</h2>
        <button @click="overturn">逆转世界</button>
        
    </div>
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
    <script>
        
        const app = new Vue({
        el: '#app',
        data: {
            msg:"Hello,World"
        },
        methods:{
         overturn(){
            // ! 先将字符串拆分为单个字符添加到数组中，然后将数组翻转，在将数组变为字符串
            this.msg = this.msg.split('').reverse().join('')
            }  
        }
        })
    </script>
</body>
</html>